1. Department of Gastroenterology and Meta-analysis Study Interest Group, General Hospital of Shenyang Military Area, Shenyang, 110840 China
2. Department of Liver Diseases and Digestive Interventional Radiology, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, 710032 China
3. Department of Gastroenterology, First Affiliated Hospital of the Medical College, Xi'an Jiaotong University, Xi'an, 710000 China